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HomeMy WebLinkAboutMINUTES - 12071993 - 1.7 5 . { 1,17 TO: BOARD OF SUPERVISORS FROM: J. MICHAEL WALFORD, PUBLIC WORKS DIRECTOR DATE: December 7, 1993 SUBJECT: Approve Camino Tassajara Realignment at Highland Road Project, Danville/San Ramon Area. Project No. 0662-6114181-92, CP # 93-44. Specific Request(s) or Recommendations) & Background & Justification I. RECOMMENDED ACTION: APPROVE PROJECT, and FIND, on the basis of the initial study and all comments received, that there is no substantial evidence that the project will have a significant effect on the environment, ADOPT the Negative Declaration in compliance with the California Environmental Quality Act, and DIRECT the Public Works Director to begin right of way acquisition and to prepare contract plans and specifications for construction. DIRECT the Director of Community Development to file a Notice of Determination and a Certificate of Fee Exemption: De Minimis Impact Finding with the County Clerk. DIRECT the Public Works Director to arrange for payment of the $25 handling fee to the County Clerk. II. FINANCIAL IMPACT: The estimated project cost is $552,000 funded by Tassajara Area of Benefit and State Local Partnership Transportation (SB 300) funds. III. REASONS FOR RECOMMENDATION/BACKGROUND: The project includes realignment and widening of about 2000 feet of Camino Tassajara at the intersection of Highland Road. Continued on Attachment: X SIGNATURE: _ RECOMMENDATION OF COUNTY ADMINISTRATOR _ RECOMMENDATION OF BOARD COMMITTEE _APPROVE _ OTHER SIGNATURE(S): ACTION OF BOARD ON DEC 7 •• 1993 APPROVED AS RECOMMENDED OTHER _ VOTE OF SUPERVISORS UNANIMOUS (ABSENT ) AYES: NOES: ABSENT: ABSTAIN: JY:jlg c\BO:bo7.tl2 1 hereby certify that this Is a true and correct copy-Df an action taken and entered on the minutes of the Orig. Div: Public Works (Design Division) Board of Supervisors on the date shown. Contact: Joe Yee (313-2323) ATTESTED: UP, a 993 .� cc: County Administrator PHIL BATCHELOR,Clerk of the Board Attn: E. Kuevor of Supervisors and Co my Administrator Auditor-Controller PW Accounting Construction By +'ems Community Development CALIFORNIA ENVIRONMENTAL QUALITY ACT NOTICE OF DETERMINATION CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT 851 PINE STREET 4TH FLOOR NORTH WING MARTINEZ, CALIFORNIA 94553-0095 Telephone: (510) 313-2296 Contact Person: Vickie Germany, Public Works Dept. Project Description, Common Name (if any) and Location: Camino Tassajara Realignment at Highland Road Danville/San Ramon area County File #CP 93-44 PEs :.:tionescr; o�tjtQ �.;. The project was approved on Pursuant to the provisions of the California Environmental Quality Act: © An Environmental Impact Report was prepared and certified. QThe Project was encompassed by an Environmental Impact Report previously prepared for QA Negative Declaration was issued indicating that preparation of an Environmental Impact Report was not required. Copies of the record of project approval and the Negative Declaration or the final EIR may be examined at the office of the Contra Costa County Community Development Department. © The Project will not have a significant environmental effect. QThe Project will have a significant environmental effect. Mitigation measures were made a condition of approval of the project. A statement of overriding considerations was adopted. Findings were adopted pursuant to Section 15091 of the State CEQA Guidelines. Date: By: Community Development Department Representative AFFIDAVIT OF FILING AND POSTING I declare that on I received and posted this notice as required by California Public Resources Code Section 21152(c). Said notice will remain posted for 30 days from the filing date. Signature Title Applicant: Department of Fish & Game Fees Due: County Public Works Department EIR - $850 Total Due: $ 255 Glacier Drive Neg. Dec. - $1,250 Total Paid: $ Martinez, CA 94553 X DeMinimis Findings - $0 Attn: Janet Frattini X County Clerk - $25 Receipt #: •spjeyojo inulenn pue puel ainised se pasn Aliuenno aie pue „spuel leinilno!jBd„ peuoz aie eaje ioafoid ayi ui ejefessel oulweO of lueoefpe slowed ayi •(Z pue L sajn6!_i aes) AiunoO eisoO eiiuoO jo eaje uowea ueg ayi ul peon puely6!H le uo!ioasJalul ay1 jo yinos iaal OOL Alaiew!xoidde of yljou leaf 00£'L Alaiewlxadde wal ejefessel ou!weO uo paieool si ioafoid ayi •paieoolai eq of aney ll!M Aennpeoi ayi }o ep!s isann ayi 6uole paieool Alivaiino sou!I peayJano pue solod Ai!I!in '9 •il!ngaj aq ll!nn Aemll!ds a pue poleneoxa eq ll!M 'paieool s! 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Governor GOVERNOR'S OFFICE OF PLANNING AND RESEARCH OCT 5 193 1400 TENTH STREET SACRAMENTO, CA 95814 a� ENW MAOM PLANNER September 30, 1993 VICKIE GERMANY CONTRA COSTA CO COMMUNITY DEVELPMENT DEPT. 651 PINE STREET, N. WING-4FL. MARTINEZ, CA 94553-0095 Subject: CAMINO TASSAJARA REALIGNMENT AT HIGHLAND ROAD; CF #93-44 SCH #: 93081133 Dear VICKIE GERMANY: The State Clearinghouse submitted the above named environmental document to selected state agencies for review. The review period„ is closed and none of the state agencies have comments. This letter acknowledges that you have complied with the State Clearinghouse review requirements for draft environmental documents, pursuant to the California Environmental Quality Act. Please call Mark Goss at (916) 445-0613 if you have any questions regarding the environmental review process. When contacting the Clearinghouse in this matter, please use the eight-digit State Clearinghouse number so that we may respond promptly. Sincerely, Christine Rinne Deputy Director, Permit Assistance STATE OF CALIFORNIA—TME RESOURCES AGENCY PETE WILSON, Governor DEPARTMENT OF CONSERVATION OFFICE OF LAND CONSERVATION 801 K STREET, MS 13-71 : SACRAMENTO, CA 95814-3528 (916) 324-0859 FAX (916) 327.3430 "'°" ► � E Septembe 1, 1993 a 1 Mr. Michael L. Hollingsworth Assistant Public Works Director Contra Costa County 255 Glacier Drive Martinez, CA 94553-4897 Dear Mr. Hollingsworth: RE: Public Acquisition of Williamson Act Contracted Land (Parcel Nos. 205-090-001 and 206-060-012) . Thank you for your letter of August 17 , 1993 which notified the Department of Conservation that the Contra Costa Public Works Department is considering the acquisition of approximately one acre of land which is covered. by Williamson Act contracts. It is the policy of the State (Government Code Section 51290) to encourage public agencies to locate public improvements on noncontracted land, rather than land covered by a Williamson Act contract (Government Code Section 51290) . However, since the purpose of the acquisition is to realign and expand an existing roadway for safety purposes, it appears that the County's request is consistent with the requirements of the Act. If you have any questions, or would like additional information, please feel free to contact me at (916) 324-0859 . Sincerely, Kenneth E. Trott, M nager Land Conservation Unit CONTRA COSTA COUNTY LOCAL AGENCY FORMATION COMMISSION 651 Pine Street,Eighth Floor • Martinez, CA 94553 (510)646-4090 • FAX(510)646-2240 ag fCc-- MEMBERS ALTERNATE MEMBERS Frances Greene Jett Smith Gavle Bishop EXECUTIVE OFFICER Public.Member Countv Supervisor County Supervisor ANNAMARIA PERRELLA Michael Menesini Tom Torlakson Joseph Canciamilla Martinez Citv Council County Supervisor Pittsburg City Council Gavle B.Uilkema Martin B.McNair September 8 , 1993 Lafayette City Council Public Meniher TO: Vickie G rmany, Public Works FROM: Annamaria Perrella, Executive Officer SUBJECT: Notice of Intent to Adopt a Negative Declaration Camino Tassajara Realignment at Highland Road County File CP 93-44 -------------------------------------------------------------- Thank you for submitting the subject Notice for LAFCO' s review. However, it appears that LAFCO will not be requested to grant any entitlements (annexation, SOI , etc. ) for the project. Therefore, I have no comments . E. Community Co ltr Harvey of Community n Director of Community Development Development Costa Department CDUr�y County Administration Building 651 Pine Street 4th Floor, North Wing E...••...L•. Martinez, California 945530095 Phone: 646-2031 0` August 30, 1993 a-o sT1•c'iii+... NOTICE OF INTENT TO ADOPT A NEGATIVE DECLARATION CAMINO TASSAJARA REALIGNMENT AT HIGHLAND ROAD, County File #CP 93-44: The project involves the realignment and widening of 2,000 feet of Camino Tassajara at the intersection of Highland Road. In addition, Highland Road will be extended about 75 feet westward in order to intersect with the new alignment of Camino Tassajara. Portions of two parcels, totalling approximately 54,860 square feet, will need to be acquired for right-of-way purposes (see Figures 2 and 3). The project's feature include the following: 1 . The proposed alignment will consist of a 32-foot wide paved road (two 12-foot lanes and 4-foot shoulders) within a 50-foot right-of-way. 2. Near the intersection of Camino Tassajara and Highland Road there will be a 44-foot paved road (two 12-foot through lanes, a 12-foot left-turn lane on southbound Camino Tassajara, and two 4-foot shoulders) within the 50-foot right-of-way. 3. A right turn flare (approximately 8-feet wide) from north-bound Camino Tassajara onto Highland road will be provided within the right-of way. 4. The drainage inlet and 24-inch drainage pipe that crosses under Camino Tassajara and empties into Tassajara Creek, will be replaced by a 42-inch drainage pipe and extended in order to accommodate the realignment of Camino Tassajara. 5. The bank of Tassajara Creek, where the drain outfall is located, will be excavated and a spillway will be rebuilt. 6. Utility poles and overhead lines currently located along the west side of the roadway will have to be relocated. The project is located on Camino Tassajara from approximately 1,300 feet north to approximately 700 feet south of the intersection at Highland Road in the San Ramon area of Contra Costa County (see Figures 1 and 2). The parcels adjacent to Camino Tassajara in the project area are zoned "Agricultural Lands" and are currently used as pasture land and walnut orchards. Interested Persons/Organizations Date: August 30, 1993 Camino Tassajara Realignment at File: CP #93-44/#4181 Highland Road, San Ramon area -2- As the owner of abutting property, or as an otherwise interested person or organization, you are invited to submit any comments you may have on this project, and raise any significant environmental issues of which you are aware so that they can be considered in the environmental review process. This letter plus enclosures will constitute a Notice of Intent to Adopt a Negative Declaration. Please circulate this information to the appropriate persons and agencies as soon as possible. Interested persons should contact the County Public Works Department, Design Division,Attention: Vickie Germany,255 Glacier Drive,Martinez, CA 94553 directly by let er to convey any concerns they may have about the environmental review for the project no later than Wednesday. September 29, 1993 at 5:00B.m. If you require further information regarding the project litself, please contact Mr. Joseph Yee of the Contra Costa County Public Works Department at (510) 313-2323. If you have any comments regarding the environmentalreview of this Notice of Intent, please contact Ms. Germany of the Contra Costa County Public Works Department at (510) 313-2296. Sincerely yours, Debbie Aime Senior Planner :gms ep6:83-44noi.pw Enclosures cc: Maureen Toms, Public Works Department Janet Frattini, Public Works Department Joseph Yee, Public Works Department Working File CONTRA PUBLIC WORKS DEPARTMENT COSTA INITIAL STUDY COUNTY OF ENVIRONMENTAL SIGNIFICANCE FILE:WO# 4181 CP#:q 3-LI 1 PROJECT NAME: Camino Tassajara Realignment at Highland Road PREPARED BY: Maureen Toms DATE: June 29, 1993 REVIEWED BYi� �� DATE:3 RECOMMENDATIONS: () Categorical Exemption (ClassNegative Declaration () Environment Impact Report Required () Conditional Negative Declaration The project will not have a significant effect on the environment. The recommendation is based on the following summary of the Environmental Evaluation: 1. The project will not create unstable earth conditions,changes in geologic substructures or increase the exposure of people or property to geologic or water related hazards. Hydroseeding the slopes above the creek after the spillway is rebuilt will minimize erosion potential. 2. No significant negative long-term aesthetics will result from the project. 3. The project will not encroach upon habitat of any unique, threatened or endangered species of animals. No new species of animals will be introduced into the area as a result of the project. In addition, there will be no removal of fish or wildlife habitat. 4. The project will convert only a minor amount(less than 2 acres)of agricultural land,under Williamson Act contracts,to roadway. 5. The project does not have the potential to achieve short-term goals to the disadvantage of long-term environmental goals. Construction of road improvements will create minor short-term temporary impacts. But no significant impacts will occur since the following best management practices are incorporated into the project and in project specifications: 6. There will be no significant change in the air quality in the project area. Construction machinery and vehicles will emit exhaust fumes and possibly objectionable odors during construction which will temporarily deteriorate air quality. To minimize the impact, contract specifications shall stipulate the use of properly tuned and muffled equipment. Air quality impacts will also be reduced by eliminating unnecessary idling of machines when not in use.Dust palliatives or water may be applied to minimize fugitive dust during construction, if warranted. 7. The creek bank, where the drainage pipe empties, will be excavated and the spillway rebuilt. Center of the spillway, a width of approximately 84", will be constructed with grouted rock. The sides of the spillway, approximately 6' on each side, will be constructed with loose rock,covered with soil,and hydroseeded. Reconstruction of the spillway will minimize erosion potential to Tassajara Creek. Construction of the spillway shall occur during periods of low or no flow to avoid water quality impacts. 8. Caltrans Standard Specifications will apply regarding construction noise. Limiting the hours of work will also minimize noise impacts. 9. Standard construction safety practices will be followed during construction to ensure no accidental release of hazardous substances or increase the potential for exposure to these substances. The County Resource Mapping System for the project area did not identify any petroleum pipelines or electric transmission lines. The project has the potential for interfering with an emergency response,but emergency response agencies in the area shall be notified prior to the onset of construction. Initial Study Camino Tassajara Realignment at Highland Road June 29, 1993 Page 2 10. During construction, traffic will be diverted within the proposed right-of-way. This will create a temporary inconvenience, which will be minimized by installing sufficient signs warning of construction. No work which could interfere with commute traffic of Camino Tassajara shall be performed between 5:00 a.m. and 8:30 a.m., nor between 4:30 p.m. and 6:30 p.m. 11. There are no rare or endangered species of plants in the project area. The trees to be removed from a riparian area and the oaks along the roadway shall be replaced at a 3:1 ratio and the slopes above the creek will be hydroseeded. Construction mats shall be used in sensitive wetland areas to minimize impacts to this habitat during construction of the spillway. 12. If during construction, archaeological resources are encountered, all work will be hatted within a 30 meter radius of the findings and a qualified archaeologist retained to ascertain the nature of the discovery. Mitigation measures recommended by the archaeologist and approved by the Public Works Department will be implemented. What changes to the project would mitigate the identified impacts. N/A USGS Quad Sheet: Tassajara Base Map Sheets: V-20 and W-20 Parcel #205-090-01 206-060-12 GENERAL CONSIDERATIONS: 1. Location:The project is located on Camino Tassajara from approximately 1,300 feet north to approximately 700 feet south of the intersection at Highland Road in Contra Costa County (see Figures 1 and 2). The parcels adjacent to Camino Tassajara in the project area are zoned"Agricultural Lands"and are currently used as pasture land and walnut orchards. 2. Project Description: The project involves the realignment and widening of 2,000 feet of Camino Tassajara at the intersection of Highland Road. In addition, Highland Road will be extended about 75 feet westward in order to intersect with the new alignment of Camino Tassajara. Portions of two parcels, totalling approximately 54,860 square feet, will need to be acquired for right of way purposes (see Figures 2 and 3). The project's feature include the following: 1. The proposed alignment will consist of a 32-foot wide paved road (two 12-foot lanes and 4-foot shoulders) within a 50-foot right-of-way. 2. Near the intersection of Camino Tassajara and Highland Road there will be a 44-foot paved road (two 12-foot through lanes, a 12-foot left turn lane on southbound Camino Tassajara, and two 4-foot shoulders) within the 50-foot right-of-way. 3. A right turn flare(approximately 8-feet wide)from north-bound Camino Tassajara onto Highland road will be provided within the right-of way. 4. The drainage inlet and 24-inch drainage pipe that crosses under Camino Tassajara and empties into Tassajara Creek, will be replaced by a 42-inch drainage pipe and extended in order to accommodate the realignment of Camino Tassajara. 5. The bank of Tassajara Creek,where the drain outfall is located,will be excavated and a spillway will be rebuilt. 6. Utility poles and overhead lines currently located along the west side of the roadway will have to be relocated. 3. Does it appear that any feature of the project will generate significant public concern? [] yes [] no [V] maybe (Nature of concem): Traffic delays during construction may be a concern. 4. Will the project require approval or permits by other than a County agency.? [V] yes [] no Agency Name(s): California Department of Fish and Game 5. Is the project within the Sphere of Influence of any city? No MP:mat c:caminoUnatudy.hgh CONTRA COSTA COUNTY CEQA ENVIRONMENTAL CHECKLIST FORM I. Background 1. Name of Proponent: Contra Costa County Public Works Department 2. Address and Phone Number of Proponent: 255 Glacier Drive Martinez, CA 94553-4897 (510) 313-2000 3. Date of Checklist Submitted: June 29, 1993 4. Name of Proposal, if applicable: Camino Tassajara Realignment at Highland Road II. Environmental Impacts (Explanations of all significant, (S), answers are required on attached sheets.) *S *1 1, Earth. Will the proposal result in: a. Unstable earth conditions or changes in geologic substructures? — ✓ b. Disruptions, displacements, compaction or overcovering of the soil? ✓ C. Change in topography or ground surface relief features? ✓ d. The destruction, covering or modification of any unique geologic or physical features? _ ✓ e. Any increase in wind or water erosion of soils, either on or off the site? ✓ f. Changes in deposition or erosion of beach sands, or changes in siltation, deposition or erosion which may modify the channel of a river or stream or the bed of the ocean or any bay, inlet or lake? _ ✓ g. Exposure of people or property to geologic hazards such as earthquakes, landslides, mudslides, ground failure, or similar hazards? _ ✓ 2. Air. Will the proposal result in: a. Substantial air emissions or deterioration of ambient air quality? _ ✓ b. The creation of objectionable odors? _ ✓ 2 *S *I C. Alternation of air movement, moisture, or temperature, or any change in climate, either locally or regionally? _ ✓ 3. Water. Will the proposal result in: a. Changes in currents, or the course of direction of water movements, in either marine or fresh waters? ✓ b. Changes in absorption rates, drainage patterns, or the rate and amount of surface runoff? ✓ C. Alterations to the course or flow of flood waters? ✓ d. Change in the amount of surface water in any water body? _ ✓ e. Discharge into surface waters, or in any alteration of surface water quality, including but not limited to temperature, dissolved oxygen or turbidity? _ ✓ f. Alteration of the direction or rate of flow of ground waters? _ ✓ g. Change in the quantity of ground waters, either through direct additions or withdrawals, or through interception of an aquifer by cuts or excavations? ✓ h. Substantial reduction in the amount of water otherwise available for public water supplies? _ ✓ i. Exposure of people or property to water related hazards such as flooding or tidal waves? _ ✓ 4. Plant Life. Will the proposal result in: a. Change in the diversity of species, or number of any species of plants (including trees, shrubs, grass, crops, and aquatic plants)? _ ✓ b. Reduction of the numbers of any unique, rare or endangered species of plants? _ ✓ C. Introduction of new species of plants into an area, or in a barrier to the normal replenishment of existing species? _ ✓ d. Reduction in acreage of any agricultural crop? — ✓ *Please Note: "s" is for significant; "I" is for insignificant. 3 *S *I 5. Animal Life. Will the proposal result in: a. Change in the diversity of species, or numbers of any species of animals (birds, land animals including reptiles, fish and shellfish, benthic organisms or insects)? _ ✓ b. Reduction of the numbers of any unique, rare or endangered species of animals? _ ✓ C. Introduction of new species of animals into an area, or result in a barrier to the migration or movement of animals? _ ✓ d. Deterioration to existing fish or wildlife habitat? _ ✓ 6. Noise. Will the proposal result in: a. Increases in existing noise levels? _ ✓ b. Exposure of people to severe noise levels? _ ✓ 7. Light and Glare. Will the proposal produce new light or glare? _ ✓ 8. Land Use. Will the proposal result in a substantial alteration of the present or planned land use of an area? 9. Natural Resources. Will the proposal result in: a. Increase in the rate of use of any natural resources? _ ✓ 10. Risk of Upset. Will the proposal involve: a. A risk of an explosion or the release of hazardous substances (including, but not limited to, oil, pesticides, chemicals or radiation) in the event of an accident or upset conditions? _ ✓ b. Possible interference with an emergency response plan or an emergency evacuation plan? — ✓ 11. Population. Will the proposal alter the location, distribution, density, or growth rate of the human population of an area? — ✓ *Please Note: "S" is for significant; "I" is for insignificant. 4 *S *I 12. Housing. Will the proposal affect existing housing, or create a demand for additional housing? ✓ 13. Transportation/Circulation. Will the proposal result in: a. Generation of substantial additional vehicular movement? ✓ b. Effects on existing parking facilities, or demand for new parking? ✓ C. Substantial impact upon existing transportation systems? _ ✓ d. Alterations to present patterns of circulation or movement of people and/or goods? _ ✓ e. Alterations to waterborne, rail or air traffic? — ✓ f. Increase in traffic hazards to motor vehicles, bicyclists or pedestrians? _ ✓ 14. Public Services. Will the proposal have an effect upon, or result in a need for new or altered governmental services in any of the following areas: a. Fire protection? _ ✓ b. Police protection? _ ✓ C. Schools? ✓ d. Parks or other recreational facilities? ✓ e. Maintenance of public facilities, including roads? ✓ f. Other governmental services? _ ✓ 15. Energy. Will the proposal result in: a. Use of substantial amounts of fuel or energy? _ ✓ b. Substantial increase in demand upon existing sources of energy, or require the development of new sources of energy? — ✓ 16. Utilities. Will the proposal result in a need for new systems, or substantial alterations to utilities? ✓ *Please Note: •'S" is for significant; "I" is for insignificant. 5 *S *I 17. Human Health. Will the proposal result in: a. . Creation of any health hazard or potential health hazard (excluding mental health)? _ ✓ b. Exposure of people to potential health hazards? ✓ 1.8. Aesthetics. Will the proposal result in the obstruction of any scenic vista or view open to the public, or will the proposal result in the creation of an aesthetically offensive site open to public view? ✓ 19. Recreation. Will the proposal result in an impact upon the quality or quantity of existing recreational opportunities? ✓ 20. Cultural Resources. a. Will the proposal result in the alteration of the destruction of a prehistoric or historic archaeological site? Archaeological survey will be conducted. ✓ b. Will the proposal result in adverse physical or aesthetic effects to a prehistoric or historic building, structure, or object? Building not listed on any historical register. — ✓ C. Does the proposal have the potential to cause a physical change which would affect unique ethnic cultural values? _ ✓ d. Will the proposal restrict existing religious or sacred.uses within the potential impact area? - _ ✓ 21. Mandatory Findings of Significance. a. Does the project have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self sustaining levels, threaten to eliminate a plant or animal community, reduce the number or restrict the range of a rare or endangered plant or animal, or eliminate important examples of the major periods of California history or prehistory? — ✓ b. Does the project have the potential to achieve short-term, to the disadvantage of long-term, environmental goals? (A short-term impact on the environment is one which occurs in a relatively brief, definitive period of time while long-term impacts will endure well into the future.) i ✓ *Please Note: "S" is for significant; -"I" is . for insignificant. 6 *S *I C. Does the project have impacts which are individually limited, but cumulatively considerable? (A project may impact on two or more separate resources where the impact on each resource is relatively small, but where the effect of the total of those impacts on the environment is significant.) _ ✓ d. Does the project have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly? _ ✓ lll. Discussion of Environmental Evaluation. (see attachment) IV. Determination On the basis of this Checklist and Environmental Evaluation: �✓ I find that the proposed project COULD NOT have a significant effect on the environment, and a NEGATIVE DECLARATION will be prepared. I find that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because the mitigation measures described on an attached sheet have been added to the project. A NEGATIVE DECLARATION WILL BE PREPARED. I find the proposed project MAY have a significant effect on the environment, and an ENVIRONMENTAL IMPACT REPORT is required. Date lona uure Reviewed By: MT:mat c:camino\check.1st (form rev.5/93) *Please Note: "S" is for significant; ".I" is for insignificant. ENVIRONMENTAL EVALUATION Camino Tassajara Realignment at Highland Road The project involves the realignment and partial widening of Camino Tassajara at the intersection of Highland Road. The proposed alignment will increase the radius of the two curves along Camino Tassajara, which will allow drivers to more safely negotiate this section of roadway. The partial widening of the roadway is necessary for the installation of a left turn pocket on southbound and a right turn lane on northbound Camino Tassajara, onto Highland Road. In addition, Highland Road will be extended about 75 feet to the west in order to intersect with the new alignment of Camino Tassajara. The proposed alignment will consist of a 32-foot wide paved road within 50-foot of right-of-way, increasing to approximately 44-foot paved road near the intersection of Highland Road to allow for the turning lanes. Portions of two parcels, totalling approximately 54,860 square feet, will need to be acquired for right-of-way purpos:,:s. A drainage inlet and 24" drain pipe located about 50 feet north of Highland Road currently crosses under Camino Tassajara and empties into Tassajara Creek. The drain pipe will be replaced by a 42-inch pipe and extended westward to accommodate the realignment of Camino Tassajara. The bank of Tassajara Creek, where the drain outfall is located, will be excavated, the spillway rebuilt. Utility poles and overhead lines currently located along the west side of the roadway will have to be relocated. In the process of preparing the Checklist and conducting the evaluation, the following resources were reviewed: 1. Contra Costa Resource Mapping System 2. The County General Plan and EIR on the General Plan 3. RAREFIND - California Natural Diversity Data Base 4. EIR for Subdivision 5736 5. Field inspection conducted on March 2, 1993. 6. Informal consultation with California Department of Fish and Game, March 17, 1993 1. Earth (A - G) According to the County Resource Mapping System, Conejo clay loam with a 0 to 2 percent slope is found in the project area, which has no hazard of erosion. Grading of the project area will result in a very minor change in topography and increase the exposure of soils to water and wind erosion, but this impact is minor and temporary. Adherence to standard dust control and erosion control practices including, but not limited to, general watering of exposed areas and/or use of chemical stabilizers will minimize this impact. These measures shall be incorporated into the construction contract. Superficial grading of the surface will not result in unstable earth conditions or changes to the geologic substructure, nor will it increase the exposure to geologic hazards. No unique geologic features are present within the project limits. The project includes enlarging and extending the corrugated metal pipe under Camino Tassajara. The creek bank, where the drainage pipe empties, will be excavated and the spillway rebuilt. Center of the spillway, a width of approximately 84", will be constructed with grouted rock. The sides of the spillway, approximately 6' on each side, will be constructed with loose Environmental Evaluation Camino Tassajara Realignment at Highland Road June 29, 1993 Page 2 rock, covered with soil, and hydroseeded. Reconstruction of the spillway will minimize erosion potential to Tassajara Creek. Construction of the spillway shall occur during periods of low or no flow to avoid water quality impacts. The use of construction mats in sensitive wetland areas, as mentioned in #4 Plants (A & D), will minimize the soil erosion during construction. 2. Air (A & B) During construction of the project, machinery and vehicles will generate emissions and objectionable odors which will temporarily deteriorate air quality at the project site. To minimize this impact, contract specifications shall stipulate the use of properly tuned and muffled equipment. Air quality impacts will also be reduced by eliminating unnecessary idling of machines when not in use. These measures could reduce construction period emissions by up to 50 percent. Implementation of dust control practices noted in #1- Earth (A - G), will also minimize air quality impacts. (C) Realigning the roadway will not cause the alteration of climate, air movement, moisture, or temperature. 3. Water (A - 1) Highland Road, near the intersection of Camino Tassajara, crosses over Tassajara Creek and according to the Contra Costa Resource Mapping System, the project area south of Highland Road is in a floodplain area. Realigning the roadway away from its present location and reconstructing the drainage spillway will not increase the exposure of people or property to flooding; impair the flow of water in marine or fresh waters; nor will it alter the course or flow of flood waters. The rate and amount of runoff is not expected to substantially increase due to the project's impervious surface area. The enlarged and expanded drainage pipe under Camino Tassajara will provide adequate drainage capacity for the roadway. As mentioned in #1 - Earth (A-G), the creek bank, where the drainage pipe empties, will be excavated and the spillway rebuilt, which will minimize water quality impacts to Tassajara Creek. As mentioned in #4 Plants (A & D), construction mats shall be used in sensitive wetland areas, which will minimize any potential water quality impacts during construction of the spillway. Construction of the spillway shall occur during periods of low or no flow to avoid water quality impacts. If water is present, the construction area shall be de-watered by pumping water through a diversion pipe to be discharged downstream in a non-erosive manner. As mentioned in #10 Risk of Upset, standard construction safety practices shall be followed in order to reduce the possibility of a spill of gasoline, oil, or other pollutants which may have a significant impact on water quality. Realigning the roadway away from the creek would also reduce the possibility of a vehicle and/or it's contents going into the creek, as a result of a traffic accident. Environmental Evaluation Camino Tassajara Realignment at Highland Road June 29, 1993 Page 3 4. Plant (A & D) Plant life in the project area consists of pasture land and a few oak trees on the west side of the road, riparian woodland on the banks of Tassajara Creek and a walnut orchard on the east side of Camino Tassajara. The project will replace approximately 53,460 square feet of pasture land and 1,400 square feet of orchard with asphalt. The parcels with the orchard and pasture are under Williamson Act contracts. Less than a dozen walnut trees from the orchard will be removed as a result of the realignment. This is not a significant impact since less than one percent of the total of each of the affected parcels will be converted from agricultural use. Several small oak trees along the west side of Camino Tassajara and several walnut trees and shrubs above the drainage outfall will be removed. Trees above the drainage outfall and the oaks will be replaced at a 3:1 ratio and the slopes above the creek will be hydroseeded. Construction mats shall be used in sensitive wetland areas to minimize impacts to this habitat during construction of the spillway. Construction of the spillway shall occur during periods of low or no flow to impacts to this habitat. (B & C) The County Resource Mapping System, field reviews, and RAREFIND showed no unique, threatened, or endangered species of plants in the project area. The orchard walnut trees above the drainage outfall will be replaced with California Black Walnut trees, which constitutes the introduction of a new species of plants to the project area; however, this species is native to the area. The project will not create a barrier to the normal replenishment of existing species. 5. Animal Life (A - D) The project will not encroach upon habitat of any unique, threatened or endangered species of animals according to the County Resource Mapping System, field reviews and RAREFIND. The removal of the pasture land and several trees from an orchard will not have a significant effect on the environment since they do not provide habitat for any unique,threatened or endangered species of animals. The trees above the.creek area will be replaced and the slope will be hydroseeded, which will provide some habitat for animals. No new species of animals will be introduced into the area as a result of the project. In addition, there will be no removal of fish or wildlife habitat. The use of construction mats, as mentioned in #4 Plants (A & D), shall be used in sensitive wetland areas during construction of the spillway, which will minimize the impact to animals. 6. Noise (A & B) The County Resource Mapping System for the project area indicate a noise level of 65 dBA for the year 2005. The dominant source of noise in the project area comes from vehicles using Camino Tassajara. In general, construction activities produce noise levels of 86 dBA at 50 feet which is well below the threshold of pain of 120-140 dBA. Limiting hours of work and following the best management practices noted in #2 -Air, will reduce construction noise levels Environmental Evaluation Camino Tassajara Realignment at Highland Road June 29, 1993 Page 4 and shall be incorporated as part of the construction contract. The project will not increase the capacity of the roadway, nor will it move the roadway closer to any sensitive receptors. 7. Light and Glare Realignment of Camino Tassajara, the addition of a left turn pocket, and the extension of Highland Road, will not produce any new light or glare. 8. Land Use The existing land use within the project limits is agricultural, including pasture land and a walnut orchard. The project will change approximately 54,860 square feet of agricultural use to public right-of-way. This is not a significant impact since it represents less than one percent of the total land of each of the affected parcels and the land owners will be compensated for the loss of property. The use of the project site is consistent with the County General Plan. Camino Tassajara will be realigned for safety purposes and will not increase the capacity of the roadway. The Williamson Act (Government Code §51200 et seq.) permits counties to provide tax breaks to farmers who agree to keep their land in agricultural production. It serves as a way of discouraging farmers from selling out to land speculators or developers for 10 years. The owner of parcel #205-090-001,the walnut orchard, is currently under a Williamson Act contract with the County. The owner of parcel #206-060-012 on the west side of the project area did not renew the Williamson Act contract in 1988, consequently the Williamson Act agreement will end in 1997. The project will not alter the Williamson Act contracts, therefore the impact is insignificant. 9. Natural Resources During construction the project will involve the use of paving materials (i.e. asphalt) which will not significantly impact this resource. The use of oil and gasoline to operate the machinery for construction purposes is negligible and of a short-term, temporary nature. Best management practices noted in #2 - Air will minimize the consumption of natural resources. 10. Risk of Upset (A) The proposed project has the potential to release hazardous substances, such as accidental petroleum spills, during construction. Per standard specifications, standard construction safety practices will be followed during construction to ensure no accidental release of hazardous substances or increase the potential for exposure to these substances. The County Resource Mapping System for the project area did not identify any petroleum pipelines or electric transmission lines, but did reveal the location of two abandoned gas wells on the west side of Camino Tassajara, outside of the project limits. Realigning the roadway away from the creek Environmental Evaluation Camino Tassajara Realignment at Highland Road June 29, 1993 Page 5 would also reduce the possibility of a vehicle and/or it's contents from going into the creek following a traffic accident. (B) The project has the potential for interfering with an emergency response, but emergency response agencies in the area shall be notified prior to the onset of construction. During construction, it will be necessary to close lanes and shift traffic. Standard specifications require installing sufficient signs warning about the construction and work hours will be restricted as mer;cloned in #13 - Transportation/Circulation (A - F). 11. Population The project will not result in a change in the location, distribution, density, or growth rate of human population in the area. As mentioned in #8 Land Use, realigning the roadway will increase the safety along Camino Tassajara and will not increase the capacity. 12. Housing The project will not affect existing housing, or create a demand for additional housing. As mentioned in #8 Land Use, realigning the roadway will increase the safety along Camino Tassajara and will not increase the capacity. 13. Transportation and Circulation Camino Tassajara is defined as an arterial roadway and a scenic route in the County's General Plan. Realigning the road will not generate additional traffic, except during construction when vehicles associated with those activities utilize the local street system. As mentioned in #10 Risk of Upset, the project has the potential for interfering with an emergency response, however emergency response agencies in the area shall be notified prior to the onset of construction and any road closures. During construction, it will be necessary to close lanes and shift traffic. Standard specifications require installing sufficient signs warning about the construction. No work which could interfere with commute traffic on Camino Tassajara shall be performed between the hours of 5:00 a.m. and 8:30 a.m., nor between 4:30 p.m. and 6:30 p.m weekdays. When completed, the project will increase safety to vehicles by increasing the radius of two curves along Camino Tassajara, which will allow drivers to more safely negotiate this section of roadway. The project will not alter waterborne, rail or air traffic as no water, rail or air transportation and facilities are located in the immediate vicinity of the project area. Environmental Evaluation Camino Tassajara Realignment at Highland Road June 29, 1993 Page 6 14. Public Service (A - D, F) The road realignment will not increase the need for fire or police protection, schools, parks, or other governmental services. (E) Camino Tassajara is currently maintained by the County. Periodic maintenance of road improvements will continue to be performed by the County. 15. Energy Minor amounts of non-renewable fuel resources will be consumed during construction, but this is a short-term, temporary and minor impact. Eliminating unnecessary idling of machines when not in use and using properly tuned equipment, as mentioned in #2 - Air (A - C) and #9 - Natural Resources, will further minimize the consumption of energy resources. 16. Utilities The project will result in the relocation of overhead power lines and poles located on the west side of the roadway, which is not a significant impact. All relocation activities shall be coordinated with the appropriate utility agencies. 17. Human Health The proposed project has the potential to release hazardous substances during construction. Potential health hazards due to accidental petroleum spills shall be minimized by following best management practices noted in #10 - Risk of Upset (A). Air quality which could affect human health can be minimized by the measures noted in # 2 - Air. The proposed project will not create any known health hazard or increase the potential for exposure. 18. Aesthetics Camino Tassajara has been identified as a scenic route in the County's General Plan. Several walnut trees above.the drainage outfall as well as a few oak trees will be removed as a result of the roadway realignment. The trees will be replaced at a 3:1 ratio. Several orchard walnut trees will also be removed as a result of the project, but will not be replaced. No significant negative long-term aesthetics will result from the project. The sight of construction equipment may be visually unattractive, but this is a minor, short-term and temporary impact, ending upon completion of construction. Environmental Evaluation Camino Tassajara Realignment at Highland Road June 29, 1993 Page 7 19. Recreation No recreational opportunities are impacted due to the realignment of Camino Tassajara since the County Resource Mapping System and the field review did not identify any recreational opportunities in the project area. 20. Cultural Resources (A-D) According to the County Resource Mapping System no historical or archaeological sites exist in the project vicinity. The County General Plan has designated Tassajara Creek as a highly sensitive area because of the probability of archeological sites along permanent and seasonal streams, however the area has been previously disturbed through construction of the existing outfall. Per standard specifications, all personnel connected with the project will be informed of the possibility of finding archaeological resources (e.g., human remains, artifacts, bedrock, bone or shell). If during construction such resources are encountered, all work will be halted within a 30 meter radius of the findings and a qualified archaeologist retained to ascertain the nature of the discovery. Measures recommended by the archaeologist and approved by the Public Works Department will be implemented. 21. Mandatory Findings of Significance (A-D) Due to construction equipment, air quality will be temporarily degraded at the project site. However, no permanent long-term impacts will result (see #2 - Air). There are no cumulative impacts associated with the project. No endangered species of plants or animals are within the project area. There will be no encroachment upon any habitat or elimination of any animal, fish, or wildlife community (see #'s 4 & 5 - Plant and Animal Life). Should examples of the major periods of California history or prehistory be found, mitigation measures described in #20 - Cultural Resources shall be imposed. The project does not have the potential to achieve short- term, to the disadvantage of long-term, environmental goals. In addition, there will be no adverse environmental effects on human beings (see #17 - Human Health). :mat c:camino\supp.hgh 15 O Q L r_- -7 7:47- 1 . 1. 1 ' • � 1 � til w G Q U o � o � d -S co a- � � d UO ; 7' Lo d 0 a- d � � 2- d Ilk 4 v � i N N O� ... ` a 0 : N <. ................ .+ ly cc ..............................., ............. s '� `tea• . °t ............. i s ;\ ti i jw P ('i:': p LU { 'f•t1� � i 1 � '' i E i t�' .il t1, { C) t• 00+ 54 W ul cr p p �P { t s'.